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#ifndef OPENCV_TLD_DETECTOR
#define OPENCV_TLD_DETECTOR

#include "precomp.hpp"
#include "opencl_kernels_tracking.hpp"
#include "tldEnsembleClassifier.hpp"
#include "tldUtils.hpp"

namespace cv
{
	namespace tld
	{
		const int STANDARD_PATCH_SIZE = 15;
		const int NEG_EXAMPLES_IN_INIT_MODEL = 300;
		const int MAX_EXAMPLES_IN_MODEL = 500;
		const int MEASURES_PER_CLASSIFIER = 13;
		const int GRIDSIZE = 15;
		const int DOWNSCALE_MODE = cv::INTER_LINEAR_EXACT;
        const double THETA_NN = 0.5;
		const double CORE_THRESHOLD = 0.5;
        const double CLASSIFIER_MARGIN = 0.1;
		const double SCALE_STEP = 1.2;
		const double ENSEMBLE_THRESHOLD = 0.5;
		const double VARIANCE_THRESHOLD = 0.5;
		const double NEXPERT_THRESHOLD = 0.2;

		static const cv::Size GaussBlurKernelSize(3, 3);



		class TLDDetector
		{
		public:
			TLDDetector(){}
			~TLDDetector(){}
			double ensembleClassifierNum(const uchar* data);
			void prepareClassifiers(int rowstep);
			double Sr(const Mat_<uchar>& patch) const;
			double Sc(const Mat_<uchar>& patch) const;
            std::pair<double, double> SrAndSc(const Mat_<uchar>& patch) const;
#ifdef HAVE_OPENCL
			double ocl_Sr(const Mat_<uchar>& patch);
			double ocl_Sc(const Mat_<uchar>& patch);
			void ocl_batchSrSc(const Mat_<uchar>& patches, double *resultSr, double *resultSc, int numOfPatches);
#endif

			std::vector<TLDEnsembleClassifier> classifiers;
			Mat *posExp, *negExp;
			int *posNum, *negNum;
			std::vector<Mat_<uchar> > *positiveExamples, *negativeExamples;
			std::vector<int> *timeStampsPositive, *timeStampsNegative;
			double *originalVariancePtr;
			std::vector<double> scValues, srValues;
			std::vector<Mat_<uchar> > standardPatches;

			std::vector <Mat> resized_imgs, blurred_imgs;
			std::vector <Point> varBuffer, ensBuffer;
			std::vector <int> varScaleIDs, ensScaleIDs;

			static void generateScanGrid(int rows, int cols, Size initBox, std::vector<Rect2d>& res, bool withScaling = false);
			struct LabeledPatch
			{
				Rect2d rect;
				bool isObject, shouldBeIntegrated;
			};
			bool detect(const Mat& img, const Mat& imgBlurred, Rect2d& res, std::vector<LabeledPatch>& patches, Size initSize);
			bool ocl_detect(const Mat& img, const Mat& imgBlurred, Rect2d& res, std::vector<LabeledPatch>& patches,  Size initSize);

			friend class MyMouseCallbackDEBUG;
			static void computeIntegralImages(const Mat& img, Mat_<double>& intImgP, Mat_<double>& intImgP2){ integral(img, intImgP, intImgP2, CV_64F); }
			static inline bool patchVariance(Mat_<double>& intImgP, Mat_<double>& intImgP2, double *originalVariance, Point pt, Size size);

        protected:
            double computeSminus(const Mat_<uchar>& patch) const;
		};


	}
}

#endif
